Riveting tool



June 4, 1957 E. H. sTAU ET AL 2,794,567

RIVETING TOOL. Y

Filed April 4, 1955 2 sheets-sheet 1 jle/eens', Kleef-f, @Ble/afs.

RIVETING TOOL .Fifa 3% 2 sheets-sheei 2 Filed April 4, 1955 Jin?. E

I 44 l 7,24 75 @29 7 i fd 5v 34 y r4.. a

.EvE/er El Sfqu, ROBERT QAA/z MM5-q Ivre-woest .Hy Zins/e ,47m/@Nays,Eq/eers, Kran-1755751? gi/eers Uited States Patent() RIVETING' TOLElvert H. Stau, Duarte, andLRobert-Frank KoleqWliittier,

Caliiyassignors to v'GlyrnpicScrew and RivetCorporation, Downey, Calif.,a corporation of California applicati@ April 4, 19ss,seria1 No. 499,044

a Claims. (ci. eis- 42) l The present invention relates in general ltoriveting tools and, more particularly, to a riveting tool of the typeused in connection with setting blind rivet assemblies, wherein theriveting vforces are .all applied `from one side of the Work. Blindrivet assemblies are widely .utilized in locations where the work isaccessible 'from one .side only, although they may be used in other'locationsralso if desired.

.A typical rivet assembly capable-of being set with the riveting tool ofthe .present invention includes a tubular rivet having a head and a tailand includes a stem eX- tending through the tubular rivet andlprojecting from the ends thereof. The stem of the rivet vassembly `isprovided adjacent the tail ofthe tubular yrivet with a tail ,aring meanswhich expands or dares 4the tail ofthe rivet outwardly to set it inresponse to axial movement ofthe stem relative tothe rivet. by ariveting tool which includes a pressure memberengageable with `the headof the tubular'rivet .to hold it Sin place Vas the stemris moved axiallyto flare `the tail of the rivet. In order to move the stem'axially, itis provided adjacent the head of the tubular rivet with means engageableby a gripper or gripping means on a-pulling member ofthe riveting toolwhich is movable axially relative to the pressure member. Thus, when arivet assembly of this nature is set by means of a riveting tool of Athecharacter described, the gripping means on =thelpul1ing member of thetooltakes hold of the gripper engageable means on the stem of the rivetassembly adjacent ,the head of the tubular rivet andvpulls the -stemofthe rivet assembly axially of the tubular rivet so 'that the -Atrailflaring means on the stem adjacent the tail of the ,tubular rivet ilaresthe tail of the tubular rivet outwardly to set it, thereby clamping-theWorkbetween the headfof the tubular rivet and the outwardly flared-tailthereof. lThe tail flaring means on the stem of the rivet assembly iseither pulled completely through the 4tubular rivet, ,ora portion of thestem is vbroken off and the tail'ilaring means is left within thetubular rivet. .Either .procedure may be utilized with lthe rivetingtool of the presentinvention.

While riveting assemblies with Whichthe rivetingtool of the presentinventionis of particular utility are all :of the foregoing generalcharacter, the gripper engageable means on the stems thereof diier. Forexample, one rivet assembly of this type whichis in widespread use has agripper engageable means on the stem-thereof which consists of a headunder which a gripping element Yis insertable. Another-Widely used rivetassembly'ofthis general character is provided on the stemlthereo'f witha gripper engageable means comprising a plurality Vof projections, ofannular or other congurations, engageable by a Vgripping means which may-comprise 'a chuck, for example. Rivet assemblies with still other:gripper engageable means are also possible.

'Because of the dilerentftypes of gripper `engageable 'means on Y thestems `ot" `rivet assemblies foflthe foregoice 'ing general characterwhich are currently 2in Widespread use, it'hasheretofore been necessaryto provide a different riveting tool for each type of gripper engageablemeans with which the rivet assemblies are provided. This hasnecessitated maintaining a complete set of riveting ,tools for each typeof gripper engageable means on the Astems of the rivet assemblies used,which is obviously expensive and undesirable.

YWith the foregoing background, the primary object of the presentinvention is to provide a single riveting .tool capable of vhandlingrivet Vassemblies of the foregoing character having on the stems thereofgripper engageable means Aof diiierent types, such as the head type or.the multiple-projection type hereinbefore discussed. Conse- -quently,the present invention eliminates any necessity for maintaining complete.sets of riveting tools for vthe Yvarious .types of. gripper engageablemeans, vand eliminates switching over to a different type of rivetingtool whenever a switch :is made from rivet Vassemblies having'one typeof gripper engageable means to rivet .assemblies Yhaving another typethereof, .whereby substantial savings 1in equipment costs, maintenancecosts, storage .costs, labor costs, and the like, result, which is animportant feature of the invention.

lMore particularly, -the primary object of ithe .inven- `tion is toprovide .a riveting tool having 'a pressure--mem Such a rivetassemblyis-set i .berengageable with the head yof the -tubular rivetzofsuch `a :rivet assembly, and having .a .pulling :member mov- .ableaxially relativefto the pressurememberiand:equipped .with rstfand secondgrippingfmeansrespectivelyengagey.able with twodiierent types Yofgripper`engageablemieans `onthe stems vof such rivet assemblies.

.Another object is to provide 'a .riveting :tool wherein the :pullingmemberiis provided withfa rst grippingzmeans -for ,cooperation witha'gripper engageable means of the head "type, and is providedwitha,secondgrippingvmeans rcooperable .with Vgripper engageable meansof-the multiaple-projection type.

Another object is to provide a rst gripping means :fcooperable with -thegripper engageable means -of lthe fhead f'type comprising a lgrippingelement `insertable `un- -der :the gripping head von -the,rivet-assembly .stem.

Anotherfobject is to provide a=second gripping fmeans for Acooperationlwith Athe gripper engageable vmeans of .the multiple-projection-typecomprisingfa chuck adapted Vto to -gr'ip the annular lOrotherprojections. Y

Another object is to fprovide a riveting ytool ihaving dischargeLpassage means through the pressure and-pull- Angmembers for theriveting assemblies bythe rst and second gripping means.

Another'object is to provide a riveting tool wherein the-pressure andpulling members are ,provided `-withaclcess openings for insertion of`either type of gripper engageable means into the correspondingygripping means.

Another object is to provide access openings in the sides of thepressure and pulling members vfor .insertion vinto the -iirst grippingmeans, .gripper engageable means o'f ,the'head type.

.Another object is to provide in the ,pressure andfpulling membersaccessopenings in the ends thereof 'for .insertion into'the secondgrippingmeans, .gripperengageable means of'the 'multiple-.projectiontype.

'Still another object is to provide movable means on 'the pressuremember engageable with the gripper engage- -able-means tof themultiplefprojection type through the 'access lopenings in the sides ofthe `pressure and pulling "members, such access openings being theaccess-openings forfthe gripper engageable means of the head type,.toprevent outward movement of the rivetassembly.:stems having thereon fgripper Aengageable .means .of ithe :multiplezproje'ctionitype. .A.related objectzis .to provide themov able means mentioned with at leastone tooth engageable with the projections of the gripper engageablemeans of the multiple-projection type.

The foregoing objects, advantages, features and results of the presentinvention, together with various Yother objects, advantages, featuresand results thereof which will become apparent, may be attained with theexemplary embodiment of the invention illustrated in the accompanyingdrawings and described hereinafter in detail. Referring to the drawings:

Fig'.V l is a side elevation of a riveting tool which embodies thepresent invention;

Fig. 2 is a longitudinal'sectional view arrowed line 2 2 of Fig.A 1; e

Fig. 3 is a longitudinal sectional view duplicating Fig. '2, butillustrating a rivet assembly having on the' stem thereof a gripperengageable meansfon one type in place in the tool; Y

Fig. 4 is a view which is partially in side elevation and partially inlongitudinal section and Vwhich illustrates a rivet assembly having agripper engageable means of another type in place in the tool;

Fig. 5 is an end view of the riveting tool taken as indicated by thearrow 5 of Fig. 1; and 5 Figs. l6, 7 and 8 are transverse sectionalviews respectively taken along the arrowed lines 6 6, 7 7 and 8 8 ofFig. 2 of the drawings. Y I y v Referring to the drawings, the rivetingtool of the inven- 'tion includes pressure and pulling membersrespectively designated generally by the numerals 10 and 12, the pres.-sure member being held stationary in use and the pulling -member 12being movable axially of the pressure member. The pulling member 12carries first and second gripping means respectively designatedgenerally by the numerals 14 and 16, and respectively engageable withgripper engageable means 18 and 20, Figs. 4 and 3, respectively, of twodifferent types of rivet assemblies 22 and 24. The riveting tool alsoincludes movable means26 onthe vpressure member 10 for engagement withthe gripper engageable means 20 of the rivet assembly 24, the means 26being movable between an operative position, shown in Fig. 3, and aninoperative position, shown in Fig. l4 of the drawings.

. Before considering theriveting tool of the invention in more detail,the Vtwo rivet assemblies 22 and 24 will be considered, the latter beingtaken up rst for convenience. Referring to` Fig. 3 of the drawings, therivet assembly 24 includes a tubular rivet 28 having a head 30 and atail 32. Extending through the tubular rivet 28 and projecting from bothends thereof is a stem 34 having thereon, adjacent the tail 32, a taililaring means indicated generally bythe numeral 36. This tail flaringmeans may include an enlargement 38 of the stem 34, terminating inanother enlargement or head 40, the enlargement 38 converging axially at42 and the tail 32 of the tubular rivet 28 being similarly convergent.As will be apparent, when the stem taken along the v34 is moved axiallyrelative to the tubular rivet 28 to ldraw the tail aring means 36 intothe tail 32 of the rivet, the tail is ared'outwardly to clamp, the work,not'y shown, between the outwardly-flared tail and the head 30.

The rivet assemblies 22 and 24 differ only in the gripper engageablemeans 18 and 20 thereof, the rivet assembly22 being identical to therivet assembly 24 as A thus far described. Considering the differencesbetween ,the gripper engageable means 18 and 20 of the two rivetassemblies 22 and `24, the gripper engageable means 18 merely comprisesa head 44 on the stem 34. The gripper engageable means 20, on the otherhand, comprises a plurality of projections 46, shown yas annular, on thestem 34. The stem of the rivet assembly 24 is provided with the annularprojections 46 throughout a substantial length, and may be provided withsuch annular --projections into the tubular stern 34 if desired.

Considering the riveting tool now in Vmore detail, .the

pressure member 10 is provided at one extremity With a pressure elementor foot 50 adapted to seat on the head 30 of the tubular rivet 28 ofeither of the rivet assemblies 22 and 24. At its other end, the pressuremember 10 is connected, by means of a tting 52, to an actuator 54 of anysuitable type. For example, the actuator 54 may be pneumatic, hydraulic,mechanical, or the like.

The pulling member 12 is housed within the pressure member 10, which ishollow to receive the pulling member. The latter is axially slidable inthe pressure member 10, the pulling member being keyed against rotationrelative to the pressure member about the common axis of the pressureand pulling members. Such keying of the pulling member 12 to thepressure member 10 is accomplished conveniently by inwardly strucksections 56 of the pressure member which project into a keyway 58 in thepulling member. The pulling member 12 is biased axially of the pressuremember by a compression spring 60 seated on an annular shoulder 62 onthe pulling member and an annular shoulder 64 on the fitting 52. Thepulling member 12 is retracted axially of the pressure member 10 awayfrom the outer or free extremity of the pressure member by a stem 66which is connected to a movable component, not shown, of the actuator54. The gripping means 14 carried by the pulling member 12 comprises agripping element 68 over which the head 44 of the gripper engageablemeans 18 of the rivet assemfbly 22 is adapted to be placed. In otherwords, the gripping element 68 is inserted under or behind the head 44,the gripping element 68 and the pressure element 50 'having radial slots70 and 71 extending inwardly fr om the peripheries thereof to receivethe stem 34 of the rivet assembly 22. The width of the slot 70 is lessthan the diameter of the head 44 so that the latter seats on thegripping element 68. The pressure member 10 and the pulling member 12are provided with registering access openings 72'and 74 whichcommunicate with the outer end of the slot 70 to permit lateralinsertion of the stem 34 of the rivet assembly 22 through the accessopenings 72 and 74 into the slot 70. The gripping element 68 is providedwith two sloping faces 76 and 78 which are engageable by the head 44 onthe stem 34 of the rivet assembly 22, the face 76 being engaged by thehead as 'the lstern is inserted into the slot'70, and the face 78 beinglengaged by the head on the stem after the stern has been inserted intothe slot 70.l It will be noted that the face A78 slopes outwardly towardthe pressure element 50 in a Idirection away from the access openings 72and 74. With this construction, when the pulling member 12 is movedaxially of the pressure member 10 in a direction away from the pressureelement 50, the stem 34 of the Vrivet assembly 22 is forced tightlyagainst the inner end of the slot 70 to hold it in the slot due to theengagement ofzthe slopingface 78 with the head 44 on the stem 34. Thus,the stem 34 of the rivet assembly 22 cannot slip out of the slot 70 vastherivet assembly 22 is set.

, It will be understood that, when the gripping means 14 'is inoperation, the movable means 26 is in its retracted position, as shownin Fig. 4 of the drawings. When the gripping means 16 is in operation,the movable means 26 fis in its extended position and, as hereinafterdescribed, projects inwardly through the lateral access openings 72 -and74kin the sides `of the pressure and pulling members .10 and 12. e

f.. The pressure and pulling members 10 and 12 are provided withopenings therein forming a discharge passage .means leading to theexterior of the pressure member 10. Through this discharge passage means80 are ex pelled the stems 34 of the rivet assemblies 22, or portionsbroken form the stems 34 of the rivet assemblies 22, depending uponwhether the entire stem is pulled through the `tubular rivet 28 insetting same, or whether a portion -of the stem is broken off in settingthetubular rivet.

Considering the gripping means 16, it is shown as in- -.-cluding acollet'chuck 84 having three fingers 86 encircled by an elastomeric'ring 88which` biases the ngers closed.

The inner faces ofthe fingers; 86 are formedwitlrindentationscomplementary to and adaptedto -receive'the' annu lar projections 46 onthe stem 34 of 'the rivet assembly 24- to grip same.

Thel chuck fingers 86,. considered collectively, provide afrusto-conical section 90 insertable. into a complementary bore 92 inthe pulling member 12to cause the fingers 86 to: clamp onto the stem 34`of the rivet assembly 24, thereby grippingv same securely. The chuckfingers` 86 are biased intothe truste-conical boreY 92 by a compressionspring 94'whichis seated at oneA end against a shoulderl 96 'on thepulling member 12 andlwhich is seated at its other end against a flange98 on a tubular member 100 which, in turn, is seated againstthe chuck84.v Thus, it will be apparent that the spring 94' andthe elastomericring. 88 cooperate'to bias the chuck fingers 86 closed.

The slots 70 and 71 in the gripping element 68 and the pressure element50 serve as access openings in the ends of the pullingandipressure'members' 12and lil for. axial insertion of the stem 34 ofthe rivet assembly 241into the chuck 84. The stem 34 ofthe rivetassembly 24, or a piece broken therefrom, is discharged through thetubular member 100 into a discharge passage means 102 provided byregistering openings in the pressure'. and pulling members and 12.Whether the entire stern 34 is pulled through the tubular rivet 28 insetting the rivet assembly 24, or whether a portion ofthe stem is brokenolf in setting the assembly, depends on the type of assembly.

The means 26 comprises a dog 104` which is insertable through thelateral access openings 72 and 74.into engagement with the gripperengageable means 20A on the stem 34 ofthe rivet assembly 24, the dog104V having one or more teeth 106 engageable with the annularprojections 46 of the gripper engageable means 20'. As will be describedin more detail hereinafter, the dog 164 prevents rearward or outwardmovement of the stem 34 of the rivet assembly 24. The dog 104 is carriedby a spring arm 10S which is pivotable on a stud 110 on the pressuremember 10, the stud having threaded thereon a knurled nut 1x12 which,when tightened, bears against the spring arm 108 to hold the dog 104 inengagement with the gripper engageable means 20. By loosening the nut112, the dog 104 may be withdrawn from the access openings 72 and 74,whereupon the spring arm 108 may be swung 180 into its retractedposition, as shown in Fig. 4` of the drawings. In order to hold the dog104 in its retracted position, one of the teeth 106 itsinto a recess 114in the pressureY member 1i).

Considering the operation of the riveting tool of the invention, itsoperation in connection with the riveting assembly 24 willl beconsidered first for convenience. Under such conditions, the dog 104 isswung into its operative or extended position, as shown in Fig. 3 of thedrawings. The gripper engageable means 20 on the stem 34 of the rivetassembly 24 is then inserted through the end access openingsY in thepressure and pulling members 10 and 12 which are provided by the slots70' and 71' in the gripping element 68 and the pressure element 5?. Theteeth 166 on the dog 104 perform a secondary function here in that theyretain the stem 34 of the rivet assembly 24 within the tool even beforethe stem is inserted into the gripping means 16, the primary function ofthe ldog 164. being considered hereinafter. Continued insertion of thestem 34 of the rivet assembly 24 causes it to enter the chuck S4, theelastomeric ring 88 and the spring 94 yielding to permit this. Theinsertion of the stem into the gripping means 16 is continued until thepressure element 59 engages the head 30 of the tubular rivet 28 of theassembly 24, whereupon the chuck 84 securely grips the gripperengageable means 20 on the stem. During the foregoing operations, theouter or free end of the pulling member 12 remains seated against theouter or free end of the pressure member 10, due to the action of thespring 60.

After the gripper engageable means 20 on the stem 34 of the.v rivetassembly 34'. has been insertedinto: the gripping meansv 16; in theforegoing manner,.the actuator 54' is energized to move the pullingmember 12 axially of thev pressure member 10y in. adirection away fromthe free end of the pressure member 10. This. results in setting of'therivet assembly 24` in the manner'herein'f before outlined to. clamp thework betweenthe. head 30 of the tubular rivet 28 and the outwardlyaredtail 32 thereof. Ultimately, the stern 34' of the rivet. assembly24'breaks off at asuitably weakened point, or the: entire stem is drawnthrough thetubular rivet 28; Wheneither of the foregoing occurs,tliepulling member 12;.is' re.- turned to its extended positionwhereinits free end seats against the freeV end of thelpressure member 10,thisbeing accomplished by the spring 60, for example. However', the teeth106' ou the dogl 1114 prevent: suchoutward or forward movement of thewhole or broken stem 34 of the rivet assembly 24,. whereby tlie chuck84slides forwardly.v over the stem as the pulling'member 12 movesforwardly toward its outer. or extended position. Thus, the whole orbroken stem 34 of the rivet assembly 24, in effect,y advances rearwardlythrough the chuck 84, this rearward movement being utilized to ejectthrough the discharge passage means 102 a whole or broken stem extractedduring setting of a previous rivet assembly 24; Alternatively, theinitial insertion of the stem 3'4 of the yrivetassembly 24 into thechuck 84 may be utilized to. expel throughv the discharge. passage means102 a whole or broken stem 34 from a previous setting of a rivetassembly 24. Thus, it will beseen that the primary function. ofY the dog104 is to prevent outward movement of the whole or broken stem 34extracted during setting of a rivet assembly 24 as the pulling member 12is returned outwardly or forwardly towards its extended posi# tion.

Considering the operation of the riveting tool of the invention inconnection with the rivet assembly 22, the dog 104 is swung into itsretracted or inoperative position, as shown in Fig. 4. Then, the stem34v of the rivet assembly 22 is inserted laterally into the pressure andpulling members 10 and 12 through the lateral or side access openings 72and 74', thereby inserting the gripping element 68 under the head 44 onthe stem of the. rivet assembly 22. As hereinbefore discussed, thesloping face 78 insures that the stem 34 will remain in position at theinner end of the slot in the gripping element 68. Thereafter, theactuator 54 is actuated to set the rivet assembly 22 in the mannerhereinbefore discussed, the stem 34 of the rivet assembly 22 eitherbeing extracted as a unit, or broken oif at a suitably weakened point,depending on the type of rivet assembly. The extracted stem 34 of therivet assembly 22, or a broken portion thereof, is discharged throughthe discharge passage means 80 in the pressure and pulling members 10and 12.

Thus, it will be apparent that the present invention provides a rivetingtool which may bel utilized to set blind rivet assemblies provided withgripper engageable means 18 and 20 of radically different types. Thesame tool may be utilized for different rivet assemblies, such as therivet assemblies 22 and 24, thereby eliminating any necessity foracquiring and maintaining a complete stock of riveting tools fordifferent rivet-assembly types, and' eliminating time losses inswitchingover` from one type of riveting tool to another.

Although we have disclosed herein an exemplary embodiment of ourinvention, it will be understood that various changes, modifications andsubstitutions may be incorporated in the embodiment disclosed withoutdeparting from the spirit of the invention as defined by the claimsallowed to us and appearing hereinafter.

We claim as our invention:

l. In a riveting tool for use with rivet assemblies which include stemshaving axially spaced tail flaring means and gripper engageable means,the latter being of different types, and iwhich include. tubular` rivetson such stems 'between said tail aring meansand at least. portions ofVsaid gripper engageable means, said tubular rivetshaving tails adjacentsaid tailaring meansand heads adjacent said gripper engageable'means,the combination of: two' relatively movable members one of which isengageable with saidtheads of said tubular rivets; first gripping meanson the other of said members for engagement with and complementary tosaid gripper engageable means of one vof said types; and a secondgripping means on said other member for engagement with andcomplementary to said gripper engageable means of another of said types,said second gripping means being contractible into engagement Ywith saidgripper engageable means of said-other type, i Y

' 2. In .a riveting tool for use with rivet assemblies which `includeystems having axially spaced tail flaring means land gripper engageablemeans, the latter -being of different types, and which include tubularrivets on such stems -between said tail flaring means and at leastportions Vof :said gripper engageable means, said tubular rivets ,havingtails adjacent said -tail flaring means and heads adjacent said gripperengageable means, the combination of: a relatively stationary pressuremember engageable with said .heads of said tubular rivets; a pullingmember movable axially yof said pressure member, said pressure andpulling members being provided with access openings in the ends and thesides thereof for insertion thereinto of said gripper engageable meanson said stems; rst gripping means on said pulling member for engagementwith and complementary to said gripper engageable means of one of saidtypes; a second gripping means Yon said pulling member for engagementwith and complementary to said gripper engageable means of another of`said types; .and movable means on said pressure member and engageablewith said'gn'pper engageable means of said other type through saidaccess openings in the sides of said pressure and pulling members.

3. A riveting tool-as dened in claim 2 wherein said movable meansincludes at least one tooth engageable with saidgripper engageable meansof said other type through the access openings in the sides of saidpressure and pulling members, said gripper engageable means of saidother type including projections engageable by said tooth.y

4. In a riveting tool for use withv rivet assemblies which include stemshaving axially spaced tail flaring means and gripper engageable means,and which include tubular rivets on said stems between at least portionsof said gripper engageable means and said tail -aring means, saidtubular rivets having tails adjacent said tail flaring means and heads-adjacent said gripper engageable means, said gripper engageable meansbeing of two different types one of which comprises heads lon saidstems, -respectively, and the other of which comprises pluralities ofprojections on said stems, respectively, the combination of: arelatively stationary pressure member engageable with said heads of saidtubular rivets; a pulling ,member movable axially relative to saidpressure member, said pressure and pulling members having accessopenings in the sides thereof for insertion of and complementary to saidgripper engageable means of said one type and havin-g access -openingsin the ends thereof for insertion of and complementary to said gripperengageable means of'said other type; vfirst gripping means on saidpulling member for engagement with and complementary to said gripperengageable means of said one per engageable means of said other type. Y

5.. In a riveting tool for use with `rivet assemblies which rincludestems having axially spaced tail vHaring means and gripper engageablemeans, land which'include tubular rivets .on said stems between at leastportions of said gripper engageable means and said tail aring means,'said tubular rivets having tails .adjacent said tail flaring means andheads adjacent said gripper engageable means, said gripper engageablemeans being of two different 4types one of which compri-ses heads onsaid stems, respectively', and the other of which comprises pluralitiesof projections on said stems, respectively, the'combination of: arelatively stationary pressure member engageable with said heads of saidtubular rivets; a pulling member movable axially relative to saidpressure member,said pressure and pulling members having Aaccessopenings in the,

sides thereof for insertion of and complementary to said gripperengageable means of said one type :and having access openings in theends thereof for insertion of and complementary to said gripperengageable means of said other type; first gripping means on saidpulling member .for engagement with land complementary to said gripperengageablemeans of said one type, said lirst gripping means including anelement insertable under said heads; and a second gripping means -onsaid pulling member for engagement with and complementary to saidgripper engageable means of said other type, said second gripping meansincluding a chuck engageable withvsaid pluralities of projections.

6. A riveting tool as defined in claim 5 including movable means on saidpressure member and engageable with said pluralities of projectionsthrough the access openings Iin the sides of said pressure and pullingmembers, said movable means including at least one tooth.

`7. A riveting tool as dened in claim 6 wherein said pressure andpulling members provide discharge passage means for at least portions ofsaid stems.

8. yIn a riveting tool, the combination of: two relatively movablemembers one of which is engageable with a part of a rivet of either of.two types; irst gripping means on the other of said members for`engagement with a part of a rivet of one `of said types; and a second,contractible gripping means on said other member for engagement with apart of a rivet of the other of said types. Y 9. IIn 'a riveting tool,the combination of two relatively movable members one of which isengageable with one part of a two-part rivet assembly of either of twotypes; rst grippingmeans on the other of said members Ifor engagementwith the other part of one of said types of rivet assemblies; and asecond, contractible gripping means on said 'other member for engagementwith the other part of a rivet assembly of the other of said tyeps.

2,053,718 Huck et al. Sept. 8, 1936 Dumas July 19, 1955V

